Blow molding machine, mold component mounting method and mold unit

ABSTRACT

A blow molding machine includes a support member that supports a mold component and a moving mechanism that moves the support member to a projecting position toward the outside of the machine and to a storing position. The machine includes a first fixed fulcrum shaft. The support member includes a base end portion rotatably supported by the first fixed fulcrum shaft and a free end portion having a first movable fulcrum shaft. The moving mechanism has rotatably interconnected links. One link is rotatably supported by the movable fulcrum shaft. In the projecting position, the links are maintained linearly by a first angle fixing tool to serve as a leg portion that supports the support member&#39;s free end portion.

TECHNICAL FIELD

The present invention relates to a blow molding machine, a moldcomponent mounting method and a mold unit.

BACKGROUND ART

For example, in a blow molding machine disclosed in patent document 1,many mold components are used. Since the mold components are madeaccording to the sizes and shapes of containers to be blow molded, whenthe sizes and shapes of the container are changed according to amanufacturing lot, the mold components must be replaced.

When the same container is mass produced, the frequency of replacementof the mold components is low. However, recently, since the kinds ofcontainers to be molded have increased and multi-kind small-quantitylots have increased, when the replacement frequency of the moldcomponents increases, there is raised the need to reduce the burden ofthe mold component replacing operation.

CITATION LIST Patent Document

-   Patent Document 1: JP-B2-H08-2586

DISCLOSURE OF THE INVENTION Problems that the Invention is to Solve

The invention aims at reducing burden of an operation to carry moldcomponents into and out from a blow molding machine.

The invention also aims at reducing burden of an operation to mount moldcomponents onto a blow molding machine.

Means for Solving the Problems

(1) One aspect of the invention is related to a blow molding machine towhich a mold component can be mounted, the blow molding machineincluding:

a support member that supports the mold component carried into or outfrom the blow molding machine; and

a moving mechanism that moves the support member to a projectingposition at which the support member projects horizontally toward anoutside of the blow molding machine and a storing position at which thesupport member is stored by the blow molding machine,

wherein the blow molding machine includes a first fixed fulcrum shaft,

wherein the support member includes a base end portion and a free endportion, the base end portion being rotatably supported by the firstfixed fulcrum shaft, and the free end portion being provided with afirst movable fulcrum shaft, and

wherein the moving mechanism includes a plurality of links rotatablyconnected to each other, one of the plurality of links being rotatablysupported by the first movable fulcrum shaft of the support member, and,when the support member is set at the projecting position, the pluralityof links are maintained linearly by a first angle fixing tool, therebyenabling the plurality of links to serve as a leg portion that supportsthe free end portion of the support member.

According to the one aspect of the invention, the mold component can becarried into and out from the blow molding machine by using the supportmember and moving mechanism permanently provided to the blow moldingmachine. Also, since the linearly maintained plurality of links are usedas the leg portion for supporting the free end portion of the supportmember protruded to the projecting position in the mold componentcarry-in/carry-out operation, a load resistant structure for theoperation to carry in/out a mold component of fairly heavy weight can berealized. Especially, in the case of a multi-kind small-quantity lot,since mold components are replaced frequently, by using the supportmember and moving mechanism permanently provided to the blow moldingmachine, the burden of the operation to replace the mold components canbe reduced greatly. Also, while the blow molding machine is actuallyworking, by folding the plurality of links, the support member can bestored at the storing position, whereby the support member and movingmechanism provide no obstacle to the actual working of the blow moldingmachine.

(2) In the one aspect of the invention, the blow molding machine caninclude a second fixed fulcrum shaft at the lower side of the firstfixed fulcrum shaft, the support member can include a second movablefulcrum shaft between the base end portion and the free end portion, andthe moving mechanism can further include a support reinforcing memberwhich is rotatably connected to the second fixed fulcrum shaft and thesecond movable fulcrum shaft respectively, a length of the supportreinforcing member being extended and shortened in accordance with themovement of the support member, and the length of the supportreinforcing member in an extended state thereof, when the support memberis set at the projecting position, being maintained by fluid pressure.By providing at least one such support reinforcing member, the loadresistant structure for the support member and moving mechanism can bestrengthened further.

(3) In the one aspect of the invention, the first angle fixing tool canincludes a first angle fixing plate, two fulcrum shafts provided to thefirst angle fixing tool and rotatably supporting the plurality of linksrespectively, two first pins, and two first insertion holes into whichthe two first pins are inserted when the support member is set at theprojecting position, and

the plurality of links to which the first angle fixing plate is attachedcan each include a first support hole that supports one of the two firstpins inserted through one of the two first insertion holes.

Thus, since the two first pins are received into the first support holesthrough the first insertion holes of the first angle fixing plate, theplurality of links rotatable about the two fulcrum shafts of the firstangle fixing plate can be maintained linearly. That is, the first anglefixing tool enables the plurality of links to serve as the leg portion.Also, by removing the two first pins, the plurality of links can befreely rotated and thus can be folded. In this manner, the supportmember can be moved to and stored at the storing position.

(4) In the one aspect of the invention, the first angle fixing plate canfurther include two second insertion holes into which the two first pinsare inserted when the support member is set at the storing position.

In this case, by receiving the two first pins into the first supportholes through the second insertion holes of the first angle fixingplate, the first angle fixing plate enables the plurality of links to bemaintained in a folded state. This can realize the compact storage ofthe plurality of links at the storing position.

(5) In the one aspect of the invention, the blow molding machine canfurther include a second angle fixing tool that fixes the angle betweenthe support member and one of the plurality of links when the supportmember is set at the storing position, the second angle fixing tool caninclude

-   -   a second angle fixing plate fixed to the support member and on        which the first movable fulcrum shaft is provided,    -   a second pin, and    -   a third insertion hole into which the second pin is inserted        when the support member is set at the projecting position, and

one of the plurality of links with the second angle fixing platearranged thereon can include a second support hole that supports thesecond pin inserted through the third insertion hole.

Accordingly, by receiving the second pin into the second support holethrough the third insertion hole of the second angle fixing plate, thesupport member and one link respectively freely rotatable with the firstmovable fulcrum shaft of the second angle fixing plate as its fulcrumcan be maintained in a direction where the link hangs down with respectto the support member. Since the angle between the support member andlink is fixed by the second angle fixing tool in this manner, the loadresistant structure for the support member and moving mechanism can bestrengthened further. Here, in the second angle fixing plate, there mayalso be formed a fourth insertion hole which functions similarly to thesecond insertion hole of the first angle fixing plate. In this case,also when the support member exists at the storing position, the anglebetween the support member and one link can be fixed.

(6) In the one aspect of the invention, the blow molding machine caninclude an injection molding station that injects a preform, and aninjection device that injects resin to the injection molding stationfrom a first direction, in a planar view, the support member canprotrude laterally from the injection molding station in a seconddirection perpendicular to the first direction to be set at theprojecting position, and the mold component can be an injection moldingmold to be mounted onto the injection molding station. According to theone aspect of the invention, the burden of the operation to carry in andcarry out an injection molding mold such as a hot runner mold and aninjection cavity mold can be reduced.

(7) In the one aspect of the invention, the molding machine can includea blow molding station that blow molds a container from a preform, themold component can include a pair of blow cavity split molds to bemounted onto the blow molding station and to be opened and closed alongthe first direction, and, in a planar view, the support member canprotrude laterally from the blow molding station in a second directionperpendicular to the first direction to be set at the projectingposition. According to the one aspect of the invention, the burden ofthe operation to carry in and carry out a blow molding mold such as apair of blow cavity split molds can be reduced.

(8) Another aspect of the invention relates to a blow molding machine towhich a mold component can be mounted, the blow molding machineincluding:

a support member that supports the mold component carried into or outfrom the blow molding machine; and

a moving mechanism that moves the support member to a projectingposition at which the support member projects horizontally toward anoutside of the blow molding machine and a storing position at which thesupport member is stored by the blow molding machine,

wherein the blow molding machine includes a fixed fulcrum shaft,

wherein the support member includes a movable fulcrum shaft movabletogether with the support member,

wherein the moving mechanism includes a link that is rotatably supportedby the fixed fulcrum shaft and the movable fulcrum shaft respectively,and

wherein, when the support member is set at the projecting position, thelink is set vertically with respect to the fixed fulcrum shaft by afirst angle fixing tool and the support member is set horizontally withrespect to the movable fulcrum shaft by a second angle fixing tool.

According to the other aspect of the invention, the burden of theoperation to carry in and carry out a mold component of relatively lightweight can be reduced.

(9) In the other aspect of the invention, the mold component may besupported by an elevation portion which can be lifted and lowered, aplurality of fixing attachments may be respectively fixed by a pluralityof bolts to the elevation portion, and the mold component can be fixedby loosening the plurality of bolts so as to rotate the plurality offixing attachments about the plurality of bolts, and fastening theplurality of bolts to the plurality of fixing attachments in a statewhere the plurality of fixing attachments are disposed at positionsfacing the elevation portion and the mold component is held between theelevation portion and the plurality of fixing attachments. The burden ofthe operation to carry in and carry out a mold component to be supportedby the elevation portion can be reduced.

(10) A further other aspect of the invention relates to a blow moldingmachine including:

a mold component;

a fixing portion to which the mold component is fixed;

a plurality of bolts supported by the fixing portion; and

a plurality of fixing attachments rotatable about the plurality ofbolts,

wherein the mold component is fixed by loosening the plurality of boltsso as to rotate the plurality of fixing attachments about the pluralityof bolts, and fastening the plurality of bolts to the plurality offixing attachments in a state where the plurality of fixing attachmentsare disposed at positions facing the fixing portion and the moldcomponent held between the fixing portion and the plurality of fixingattachments.

Accordingly, since the fixing attachment can be provided permanently inthe fixing portion, the burden of the mounting/removing operation can bereduced, and further, can also contribute toward preventing the loss ofthe fixing attachment and bolt.

(11) A further other aspect of the invention relates to a blow moldingmachine including:

a lower base;

an upper base facing the lower base;

a transfer plate supported by the upper base;

two first rails supported by the upper base;

a lip plate carried in along the two first rails;

two second rails fixed to the transfer plate on an extension line of thetwo first rails; and

a lip plate fixing attachment inserted into a hole formed in thetransfer plate to fix the lip plate supported by the two second rails.

According to the further other aspect of the invention, the lip platecan be slid onto the second rail through the first rail, and can bemounted only by the lip plate fixing attachment.

(12) A further other aspect of the invention relates to a method formounting a mold component, the method including:

a step of carrying a mold unit into a blow molding machine, the moldunit configured by a dummy lip plate and an upper mold componentrespectively loaded on a lower mold component;

a step of fixing the lower mold component of the mold unit to a lowerfixing portion of the blow molding machine;

a step of lowering an upper elevation portion disposed above an upperbase of the blow molding machine to set the upper elevation portion to amold clamping position at a lower side of a transfer plate through ahole formed in the transfer plate, before a lip mold is mounted onto thetransfer plate supported by the upper base of the blow molding machine;

a step of fixing the upper mold component to the upper elevation portionset at the mold clamping position;

a step of lifting the upper elevation portion to separate the upper moldcomponent from the mold unit; and

a step of removing the dummy lip plate thereafter.

According to the further other aspect of the invention, the upper moldcomponent and lower mold component can be carried in integrally as aunit, the upper mold component and the upper elevation portion forsupporting the same can be set and mounted at the mold clampingposition, and especially, the burden of the operation to mount the uppermold component can be reduced.

(13) In the further other aspect of the invention, the lower moldcomponent can be a hot runner mold and an injection cavity mold, theupper mold component can be an injection core mold, the lower fixingportion can be a lower base of the blow molding machine, and the hotrunner mold of the lower mold component is fixed to the lower base, andthe upper elevation portion can be an injection core mold fixing portionfixed to a mold clamping plate disposed above the upper base of the blowmolding machine to be lifted and lowered, and the injection core moldcan be fixed to the injection core mold fixing portion. In this case,especially, the burden of the operation to mount the injection core moldcan be reduced.

(14) In the further other aspect of the invention, the lower moldcomponent can be a temperature regulating pot, the upper mold componentcan be a temperature regulating core, the lower fixing portion can be alower elevation portion that is lifted and lowered by a lower elevationdrive portion fixed to a lower base side of the blow molding machine,and the upper elevation portion can be lifted and lowered by an upperelevation drive portion fixed to the upper base side of the blow moldingmachine. Thus, especially, the burden of the operation to mount thetemperature regulating core can be reduced.

(15) A further other aspect of the invention relates to a mold unitincluding:

a lower mold component;

a dummy lip plate loaded on the lower mold component; and

an upper mold component loaded on the dummy lip plate,

wherein the dummy lip plate sets a gap, at the time of mold clamping,between the lower mold component and the upper mold component, which aremounted onto the blow molding machine and mold clamped.

According to the further other aspect of the invention, the upper moldcomponent and lower mold component can be handled as a unit when theyare carried in and carried out.

Effects of the Invention

According to the invention, the burden of the operation to carry a moldcomponent into or out from a blow molding machine can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a planar view of a blow molding machine according to anembodiment of the invention, with its upper base removed.

FIG. 2 is a front view of the injection molding station and blow moldingstation of the blow molding machine shown in FIG. 1 .

FIG. 3 is a side view of the machine, showing a state where the supportmember of a first injection mold carry-in/carry-out device is set at aprojecting position and at a storing position.

FIG. 4 is a front view of an injection mold unit.

FIG. 5 is an explanatory view of a method for mounting onto a moldclamping plate an injection core mold which is carried in by the firstinjection mold carry-in/carry-out device and is set at a mold clampingposition.

FIG. 6 is a planar view of a transfer plate.

FIG. 7 is an explanatory view of a method for mounting the injectioncore mold by using a fixing attachment.

FIG. 8 is a view of a second injection mold carry-in/carry-out deviceand a second blow mold carry-in/carry-out device.

FIG. 9 is a view of an injection core mold to be carried by a secondinjection mold carry-in/carry-out device.

FIG. 10 is a view of first and second blow mold carry-in/carry-outdevices.

FIG. 11 shows a state where a blow core mold and a stretch rod fixingplate to be carried by the second blow mold carry-in/carry-out deviceare mounted.

FIG. 12 shows a state where a temperature regulating pot is mounted.

FIG. 13 shows a state where a temperature regulating core is mounted.

FIG. 14 is a front view of a removal device.

FIG. 15 is a side view of the removal device.

FIG. 16 is a planar view of a lip plate carry-in/carry-out device.

FIGS. 17(A) and (B) respectively show a state where a lip plate ismounted.

MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the invention will be specificallydescribed with reference to a comparison example. Here, the embodimentsdescribed hereinafter do not limit unreasonably the contents of theinvention disclosed in the appended claims and all of structures to bedescribed in the embodiments are not always the essential structures asthe solving means of the invention.

1. Blow Molding Machine

A blow molding machine according to the embodiments of the inventionwill be described with reference to the same drive system as in a4-station blow molding machine of a rotation transfer type disclosed in,for example, the patent document 1, as an example. However, theinvention is not limited thereto except for some of the embodiments. Theblow molding machine of the patent document 1 is a blow molding machineof a 1 stage system or a hot parison system in which a preform (parison)is injected in an injection molding station and the preform is carriedinto the blow molding station by a lip mold used in injection molding tothereby bow mold a container. The blow molding machine of a 1 stagesystem is capable of installing a temperature regulating station betweenthe injection molding station and blow molding station and a removalstation downstream of the blow molding station. An embodiment excludingthe injection molding station, temperature regulating station or removalstation can be applied to a blow molding machine of a two stage systemor a cold parison system in which a previously injection molded preformis heated and the preform is blow molded in a blow molding station.Also, as for the transfer system of a molded product, the invention canbe applied to a blow molding machine which transfers the molded productby using not a rotation transfer system but a linear transfer system.

The present embodiment relates to a structure and a method for mountinga mold component onto a blow molding machine or removing the moldcomponent from the blow molding machine, while description is given toonly the structure of the blow molding machine that is necessary forreplacement of the mold component. Also, the term “mold component” meansa molding component that is replaced according to the size or the likeof a container to be blow molded. Specifically, the mold component meansone of various molds including an injection core mold, an injectioncavity mold, a hot runner mold, a temperature regulating pot, atemperature regulating core, a blow core mold, a blow mold, a stretchrod, an eject pin, a lip mold (lip plate) and a neck mold, or a metalmold unit constituted of two or more of these superimposed on top ofeach other. Further, in some cases, the mold component may include acomponent which fixes or supports a mold, or serves as a spacer member.

FIG. 1 shows a blow molding machine of a rotation transfer type and,specifically, it is a planar view with an upper base removed. In FIG. 1, on a machine base 10, there exist a first area 1 for carrying aninjection device (not shown) thereon and a second area 2 for molding amolding product after it is rotation transferred thereto. As shown inFIG. 1 , two orthogonal-axis directions in the planar view are called afirst direction A and a second direction B, respectively. A rotationdirection around a vertical axis orthogonal to the two orthogonal-axisdirections A, B is called C. In the second area 2, there are arranged,at 90-degree intervals along the rotation direction C, an injectionmolding station 100, a temperature regulating station 200, a blowmolding station 300 and a removal station 400. An injection devicearranged in the first area 1 injects resin toward the injection moldingstation 100 in the first direction A. A mold clamping/opening directionin the injection molding station 100 is, for example, a verticaldirection where a mold clamping plate 102 (see FIG. 3 ) to be lifted andlowered together with three movable tie bars 101 moves. In the blowmolding station 300, the opening/closing direction of a moldclamping/opening device 301 also coincides with the first direction A.

2. Injection Molding Station 2.1. First Injection MoldCarry-In/Carry-Out Device

Firstly, description is given to the replacement of a mold component inthe injection molding station 100 with reference to FIGS. 2 to 4 . Asshown in FIG. 2 , the machine base 10 includes a lower base 11 thereon.In the injection molding station 100 shown in FIG. 4 , a hot runner mold111 is fixed to the top surface of the lower base 11, while an injectioncavity mold 112 is fixed to the top surface of the hot runner mold 111.Thus, a mold component to be mounted on the lower base 11 side is thehot runner mold 111 and injection cavity mold 112 having an injectioncavity 112A. In this embodiment, as shown in FIG. 4 , on the injectioncavity mold 112, there is further put an injection core mold 113 havingan injection core 113A through a dummy lip plate 114 and, in the moldreplacement, an injection mold unit 110 shown in FIG. 4 can be handledintegrally. Description of the injection mold unit 110 will be givenlater.

In order to carry in and out the injection mold unit 110, a firstinjection mold carry-in/carry-out device 500 shown in FIGS. 1 to 3 ispermanently provided to the blow molding machine. The first injectionmold carry-in/carry-out device 500 includes a support member 510 forsupporting the injection mold unit 110 and a moving mechanism 520 formoving the support member 510. The moving mechanism 520, as shown inFIGS. 1 and 3 , moves the support member 510 to a projecting position P1at which the support member 510 projects horizontally toward the outsideof the blow molding machine and a storing position P2 at which thesupport member 510 is stored in the blow molding machine. At the storingposition P2, for example, the support member 510 can be stored in avertical state where it extends parallel to the side surface of themachine base 10.

The blow molding machine has a first fixed fulcrum shaft 20. The supportmember 510 includes a base end portion 511 and a free end portion 512,while the base end portion 511 is rotatably supported by the firstfulcrum shaft 20 and the free end portion 512 is provided with a firstmovable fulcrum shaft 513.

The moving mechanism 520 includes a plurality of links 521, 522rotatably connected to each other, while one 521 of the plurality oflinks 521, 522 is rotatably supported by the movable fulcrum shaft 513.In this moving mechanism 520, when the support member 510 is set at theprojecting position P1, the plurality of links 521, 522 are heldlinearly by a first angle fixing tool 530, whereby the plurality oflinks 521, 522 serve as a leg portion that supports the free end portion512 of the support member 510.

In this embodiment, while the hot runner mold 111 and injection cavitymold 112 are handled as an integral body, or the injection mold unit 110is handled as an integral body, a mold component can be carried into orout from the blow molding machine by using the first injection moldcarry-in/carry-out device 500 permanently provided to the blow moldingmachine. Further, when the mold component is carried in/out, since thelinearly maintained plurality of links 521, 522 are used as the legportion for supporting the free end portion of the support member 510projected to the projecting position P1, there can be realized a loadresistant structure for the operation to carry in/out a mold componentof a fairly heavy weight. Especially, in the case of a multi-kindsmall-quantity lot, since mold components are replaced frequently, byusing the first injection mold carry-in/carry-out device 500 permanentlyprovided to the blow molding machine, the burden of the operation toreplace the mold components can be reduced greatly. Also, while the blowmolding machine is in actual operation, by folding the plurality oflinks 521, 522, the support member 510 can be stored at the storingposition P2, whereby the first injection mold carry-in/carry-out device500 is free from interference with the actual operation of the machine.

Here, as shown in FIGS. 1 and 3 , on the surface of the support member510, a plurality of spheres 515 partially projecting from the surfacecan be rotatably supported. Also, on the surface of the lower base 11where the injection molding station 100 is arranged, spheres 30partially projecting from the surface can be rotatably supported. Inthis case, since the mold component rolls in contact with the spheres30, 515 to thereby reduce its friction force, the carry in/out operationcan be performed with reduced load. Here, the spheres 30 projecting fromthe lower base 11 are projectingly energized by an energizing membersuch as a spring and, by clamping the hot runner mold 111 to the lowerbase 11, the spheres 30 become flush with the surface of the lower base11.

In this embodiment, by providing a support reinforcing member (forexample, an air damper) 540 shown in FIGS. 2 and 3 , the position changeof the support member 510 in the first injection mold carry-in/carry-outdevice 500 can be attained easily. For this purpose, the blow moldingmachine includes a second fixed fulcrum shaft 21 at the lowers side ofthe first fixed fulcrum shaft 20. Also, the support member 510 includesa second movable fulcrum shaft 514 between the base end portion 511 andfree end portion 512.

The support reinforcing member 540 is rotatably connected to the secondfixed fulcrum shaft 21 and second movable fulcrum shaft 514 and, inaccordance with the movement of the support member 510, extends andshortens its length, whereby it maintains, by a hydraulic pressure, itsextended length when the support member 510 is set at the projectingposition P1. The support reinforcing member 540 can include, forexample, a cylinder 541 with fluid sealed therein and a piston rod 542removably insertable into the cylinder 541.

In FIG. 2 , there are provided two support reinforcing members 540.However, by providing at least one support reinforcing member 540, theload resistant structure of the first injection mold carry-in/carry-outdevice 500 can be further strengthened.

The first angle fixing tool 530, as shown in FIG. 3 , includes a firstangle fixing plate 531, two fulcrum shafts 532, 533 provided on thefirst angle fixing plate 531 respectively for supporting the pluralityof links 521, 522 rotatably, first pins 534, 535, and two firstinsertion holes 534A, 535A into which, when the support member 510 isset at the projecting position P1, the two first pins 534, 535 can beinserted. On the other hand, the plurality of links 521, 522, on whichthe first angle fixing plate 531 is disposed, respectively include afirst support hole 521A (522A) for supporting one of the two first pins534 (535) inserted through the first insertion holes 534A (535A).

Thus, the plurality of links 521, 522 rotatable with the two fulcrumshafts 532, 533 of the first angle fixing plate 531 as their fulcrums,as shown in FIG. 3 , can be maintained linearly, for example, in thevertical direction when the two first pins 534, 535 are received intothe first support holes 521A, 522A through the first insertion holes534A, 535A of the first angle fixing plate 531. At this time, the twofulcrum shafts 532, 533 and the two first pins 534, 535 inserted intothe first insertion holes 534A, 535A are also arranged linearly in thevertical direction. Therefore, the first angle fixing tool 530 enablesthe plurality of links 521, 522 to serve as the leg portion. Also, byremoving the two first pins 534, 535, the plurality of links 521, 522can be freely rotated and thus folded. In this manner, the supportmember 510 can be moved to the storing position P2 and stored there.

The first angle fixing plate 531, as shown in FIG. 3 , can furtherinclude two second insertion holes 534B. 535B into which, when thesupport member is set at the storing position P2, the two first pins534, 535 can be inserted. In this case, when the two first pins 534, 535are received into the second support holes 521A, 522A through the secondinsertion holes 534B, 535B of the first angle fixing plate 531, theplurality of links 521, 522, as shown in FIG. 3 , are bent by the firstangle fixing plate 531 and are maintained parallel. At this time, thetwo fulcrum shafts 532, 533 and the two first pins 534, 535 insertedinto the second insertion holes 534B, 535B are arranged linearly in thehorizontal direction. Thus, the plurality of links 521, 522 can bestored compactly at the storing position P2.

In this embodiment, as shown in FIG. 3 , there can be further included asecond angle fixing tool 550 which, when the support member 510 is setat the projecting position P1, fixes the angles of the support member510 and one link 521 of the plurality of links 521, 522. The secondangle fixing tool 550 can include a second angle fixing plate 551, whichis fixed to the support member 510 and to which a first movable fulcrumshaft 513 is provided, a second pin 552, and a third insertion hole 552Ainto which, when the support member 510 is set at the projectingposition P1, the second pin 552 is inserted. On the other hand, the link521, to which the second angle fixing plate 551 is disposed, can have asecond support hole 521B for supporting the second pin 552 insertedthrough the third insertion hole 552A.

Thus, when the second pin 552 is received into the second support hole521B through the third insertion hole 552A of the second angle fixingplate 551, the support member 510 and link 521, which are freelyrotatable with the first movable fulcrum shaft 513 of the second anglefixing plate 551 as a fulcrum, are maintained in a direction where, asshown in FIG. 3 , the link 521 hangs down with respect to thehorizontally extending support member 510. At this time, the firstmovable fulcrum shaft 513 and second pin 552 inserted into the thirdinsertion hole 552A are arranged linearly in the vertical direction.Thus, by fixing the angle between the support member 510 and link 521 bythe second fixing tool 550, the load resistant structure of the firstinjection mold carry-in/carry-out device 500 can be furtherstrengthened.

Here, in this embodiment, the second angle fixing plate 551 can have afourth insertion hole 552B functioning similarly to the second insertionholes 534B, 535B formed in the first angle fixing plate 531. In thiscase, also when the support member 510 exists at the storing positionP2, the angles of the support member 510 and link 521 can be fixed.

2.2. Injection Unit Integrally Mounting/Removing Method

Next, description is given to a method for mounting an injection moldonto the blow molding machine using the first injection moldcarry-in/carry-out device 500 with reference to FIGS. 4 and 5 . Beforethat, the clamping drive of the injection mold is explained withreference to FIG. 3 . At the lower side of the machine base 10 shown inFIG. 3 , there is provided a traction plate 103 and, as the tractionplate 103 is lifted and lowered, a mold clamping plate 102 connected tothe traction plate 103 by three movable tie bars 101 is lifted andlowered. An injection core mold fixing portion 104 is fixed to the moldclamping plate 102. Here, the mold clamping plate 102 and injection coremold fixing portion 104 capable of lifting and lowering the injectioncore mold 113 are also called an elevation portion.

The hot runner mold 111 shown in FIG. 4 is fixed to the lower base 11,while the injection cavity mold 112 is fixed to the top surface of thehot runner mold 111. On the other hand, the injection core mold 113 isfixed to the injection core mold fixing portion 104 supported by themold clamping plate 102. Also, as shown in FIG. 2 , on the upper base12, there is rotatably supported a transfer plate 13 which can be drivento rotate. The transfer plate 13, as shown in FIG. 1 of the patentdocument 1, includes four transfer plates arranged at 90-degreeintervals in the planar view, and one of the four transfer plates 13 isstopped in the injection molding station 100. In each of the fourtransfer plates 13, there is arranged a lip mold (not shown) to besupported by a mounting hole 15 formed in an openable/closable lip plate14. The transfer plate 13 further includes a hole 16 to be describedlater.

Referring to the mold clamping operation in the injection moldingstation 100, when the transfer plate 13 and mold clamping plate 102 arelowered to close the injection core mold 113 to the lip mold and furtherthe mold clamping plate 102 is lowered, the lip mold is pressed by theinjection core mold 113 and is lowered together with the transfer plate13 and lip plate 14, whereby the injection core mold 113 and lip moldare clamped to the injection cavity mold 112. Here, the transfer plate13 in this embodiment includes, for example, such an elevation mechanismas disclosed in the patent document 1 and can be driven to lift andlower independently of an injection core.

In order to carry a mold component into the injection molding station100, there is prepared, for example, the injection mold unit 110 shownin FIG. 4 . Here, the injection mold unit 110 is carried in a statewhere the lip mold and the lip plate 14 for supporting the same are notmounted on the transfer plate 13. A gap G between the injection cavitymold 112 and injection core mold 113 in the mold clamping time shown inFIG. 4 is originally set by the lip plate 14 and lip mold. Since the lipplate 14 and lip mold are not present at the mold carry-in time, the gapG is secured by using the dummy lip plate 114 shown in FIG. 4 . In thisembodiment, the gap G is set by the dummy lip plate 114 and two dummylip molds 114A provided on its both ends in the longitudinal direction.However, the gap G may also be set only by the dummy lip plate 114. Theintervention of the dummy lip plate 114 enables the injection core mold113 to be set at the original mold clamping height from the lower base11 when the hot runner mold 111 is mounted on the lower base 11. Here, amold component existing at the upper side of the dummy lip plate 114 iscalled an upper mold component, whereas a mold component existing at thelower side of the dummy lip plate 114 is called a lower mold component.

The injection mold unit 110 is loaded on the support member 510 set atthe projecting position P1 shown in FIGS. 1 and 3 . When pushed, theinjection mold unit 110 is moved in rolling contact with the spheres 514on the support member 510 and spheres 30 on the lower base 11 and ispositioned at a given position by a positioning pin 109 shown in FIG. 1. And, the hot runner mold 111 of the injection mold unit 110 is fixedto the lower base 11 of the blow molding machine (see FIG. 4 ). Thus,since the hot runner mold 111 is fixed to the lower base 11 and theinjection cavity mold 112 is previously fixed on the hot runner mold111, the mounting of the mold component onto the lower base 11 iscompleted.

Next, there is carried out a process for fixing the injection core mold113 to the injection core mold fixing portion 104. Specifically, in astate before the lip plate 14 and lip mold are mounted on the transferplate 13 supported by the upper base 12 of the blow molding machine orby the transfer plate elevation mechanism, the mold clamping plate 102disposed above the upper base 12 of the blow molding machine is pulledand lowered by the traction plate 103. Since the lip plate 14 and lipmold are not mounted on the transfer plate 13, the hole 16 (see FIG. 6 )capable of passing the injection core mold 113 therethrough is opened.Therefore, in the mold component mounting time, by lowering the transferplate 13 earlier, the injection core mold 113 can be set at a moldclamping position existing at the upper side of the transfer plate 13through the hole 16 of the transfer plate 13.

On the other hand, as described above, the injection core mold 113 ofthe injection mold unit 110 fixed to the lower base 11 is set at themold clamping position due to the intervention of the dummy lip plate114. FIG. 5 shows a state where the injection core mold 113 of theinjection mold unit 110 is set at the mold clamping height. By loweringthe injection core mold fixing portion 104 down to the mold clampingheight position, the injection core mold 113 can be fixed to theinjection core mold fixing portion 104.

Here, as an example for fixing a mold component to a fixing portion,there is shown in FIG. 7 an example for fixing the injection core mold113 to the injection core mold fixing portion 104. The injection coremold 113 serving as a mold component has two projections 113B providedon the upper ends thereof facing the injection core mold fixing portion104 serving as a fixing portion and projecting in the width directionthereof. To the injection core mold fixing portion 104, there are fixedfixing attachments 105, for example, L-shaped attachments 105 eachhaving a vertical portion 105A and a horizontal portion 105B, usingbolts 106. Mounting attachments 107, each having a hole for insertion ofthe bolt 106 therethrough, can be fixed to the injection core moldfixing portion 104 by using a bolt 108. Here, the shape of the mountingattachment 107 may also be provided integrally with the injection coremold fixing portion 104.

Since the four (in FIG. 7 , only two on one side are shown) horizontalportions 105B, 105B are arranged so as to face inward and to be opposedto each other, the two projections 113B of the injection core mold 113are held between the L-shaped attachments 105 and mounting attachments107 and are fastened by the bolts 106.

As described above, when lowering the injection core mold fixing portion104 and setting it at the mold clamping position, the bolts 106 are beloosened, the four L-shaped attachments 105 are rotated about the bolts106, and the four horizontal portions 105B are set to face outward. Inthis case, the injection core mold fixing portion 104 can be set at themold clamping position without interfering with the two projections 113Bof the injection core mold 113. After then, the four L-shapedattachments 105 are rotated about the bolts 106 to provide a state shownin FIG. 7 , and the bolts 106 are then fastened. This can facilitate themold component replacing operation.

The L-shaped attachments 105 need not be removed each time the moldcomponent is replaced but the bolts 106 may only be loosened. Thus, theL-shaped attachments 10 can be permanently provided to the injectioncore mold fixing portion 104, thereby eliminating the fear of the lossof components.

Here, the fixing of the mold component using such L-shaped attachmentcan also be applied to other mold than the injection core mold 113. Forexample, it can also be used to the mounting of the hot runner mold 111onto the lower base 11, the mounting of the injection cavity mold 112onto the hot runner mold 111, etc., and further, can also be used to themounting of various mold components to be described later. Also, forfacilitation of the mold mounting and removing operation by the L-shapedattachment, the penetration hole for the bolt 106 may be formed in anelongated hole shape, whereby, after the bolt is loosened, the membercan be moved horizontally.

After the injection core mold 113 is mounted on the injection core moldfixing portion 104, the mold clamping plate 102 is lifted and theinjection core mold 113 is lifted by the injection core mold fixingportion 104. Thus, the injection core mold 113 can be separated from theinjection mold unit 110. Finally, the dummy lip plate 114 is removedfrom the injection cavity mold 112. This completes the mold componentmounting in the injection molding station 100. Here, by performing theabove mounting process in reverse order, when removing the moldcomponent from the injection molding station 100, it can be removed inthe state of the injection mold unit 110 shown in FIG. 4 .

2.3. Second Injection Mold Carry-In/Carry-Out Device and Mounting Method

FIG. 8 shows a second injection mold carry-in/carry-out device 600 forcarrying in/out the injection core mold 113. The second injection moldcony-in/carry-out device 600 includes a support member 610 that supportsthe injection core mold 113 serving as a mold component to be carriedinto and out from the blow molding machine, and a moving mechanism 620that moves the support member 610 to a projecting position P3 at whichthe support member 610 projects horizontally toward the outside of theblow molding machine and a storing position P4 at which the supportmember is stored by the blow molding machine.

The blow molding machine has a fixed fulcrum shaft 22. The supportmember 610 has a movable fulcrum shaft 611 movable together with thesupport member 610. The moving mechanism 620 has a link 621 rotatablysupported by the fixed fulcrum shaft 22 and movable fulcrum shaft 611.When the support member 610 is set at the projecting position P3, thelink 621 is set vertically with respect to the fixed fulcrum shaft 22 bya first angle fixing tool 630, and the support member 610 is sethorizontally with respect to the movable fulcrum shaft 611 by a secondangle fixing tool 640. The first and second angle fixing tools 630 and640 can be structured similarly to the first and second angle fixingtools 530 and 550 shown in FIG. 3 , while the angles of the supportmember 610 and link 621 can be fixed by pins in such a manner that theycan be maintained at the projecting position P3 or at the storingposition P4. Here, at the storing position P4, the support member 610and link 621 are both stored parallel in the vertical direction.

The support member 610, as shown in FIG. 9 , can be constituted of tworails 610A and 610B. The injection core mold 113 serving as a moldcomponent includes projections 113C, 113C to be carried on the rails610A and 610B. By sliding the projections 113C, 113C on the rails 610Aand 610B, the injection core mold 113 can be carried into the lower sideof the injection core mold fixing portion 104. The injection core mold113 carried into the lower side of the injection core mold fixingportion 104 is fixed in the same method as the method shown in FIG. 7 .However, an L-shaped attachment 105 situated on the carry-in side of theinjection core mold 113 in the injection core mold fixing portion 104shown in FIG. 8 must be removed previously, because it interferes withthe injection core mold 113 carried in. The removal of the injectioncore mold 113 can be performed in reverse order to the above-mentionedmounting process.

When the second injection mold carry-in/carry-out device 600 is used,the injection mold unit 110 shown in FIG. 4 is not used. The hot runnermold 111 and injection cavity mold 112 are integrally carried onto thelower base 11 of the blow molding machine using the second injectionmold carry-in/carry-out device 600. After then, when the hot runner mold111 is fixed to the lower base 11, the mounting of the mold componentonto the lower base 11 is completed. The injection core mold 113 ismounted using the second injection mold carry-in/carry-out device 600.

3. Blow Molding Station 3.1. First Blow Mold Carry-In/Carry-Out Device

Next, description is given of the first blow mold carry-in/carry-outdevice 700 with reference to FIGS. 1, 2 and 10 . The first blow moldcarry-in/carry-out device 700 is substantially the same in structure asthe first injection mold carry-in/carry-out device 500 and includes asupport member 710 and a moving mechanism 720. In this embodiment, thefirst blow mold carry-in/carry-out device 700 is different from firstblow injection carry-in/carry-out device 500 in that the support member710 does not include on its surface the spheres 515 provided on thesurface of the support member 510. A blow mold (not shown) to be carriedon the support member 710 includes at least a pair of blow cavity molds,a pair of pressure receiving plates and a pair of fixing plates forfixing them. Since the paired pressure receiving plates include on theirlower surfaces slide attachments for reducing their friction withrespect to the lower base 11, when carrying in and out the blow mold,the friction thereof on the support member can be reduced by the slideattachments. Or, instead of the slide attachment, a rolling member, forexample, a roller may also be provided on the side surface of the blowmold.

The moving mechanism 720, as shown in FIGS. 1, 2 and 10 , moves thesupport member 710 to a projecting position P5 at which the supportmember 710 projects horizontally toward the outside of the blow moldingmachine and a storing position P6 at which the support member 710 isstored by the blow molding machine. At the storing position P6, forexample, the support member 710 can be stored in a vertical state sothat it extends parallel to the side surface of the machine base 10.

The blow molding machine includes a first fixed fulcrum shaft 23. Thesupport member 710 includes a base end portion 711 and a free endportion 712, while the base end portion 711 is rotatably supported bythe first fixed fulcrum shaft 23 and the free end portion 712 includes afirst movable fulcrum shaft 713.

The moving mechanism 720 includes a plurality of links 721, 722rotatably connected to each other, while one link 721 of the pluralityof links 721, 722 is rotatably supported by the movable fulcrum shaft713 of the support member 710. In the moving mechanism 720, when thesupport member 710 is set at the projecting position P5, the pluralityof links 721, 722 are maintained linearly by a first angle fixing tool730, whereby the plurality of links 721, 722 serve as a leg portion forsupporting the free end portion 712 of the support member 710.

In this embodiment, by providing a support reinforcing member (forexample, an air damper) shown in FIGS. 2 and 10 , the position change ofthe support member 710 in the first blow mold carry-in/carry-out device700 can be facilitated. For this purpose, the blow molding machineincludes a second fixed fulcrum shaft 24 at the lower side of the firstfixed fulcrum shaft 23, while the support member 710 includes a secondmovable fulcrum shaft 714 between the base and free end portions 711 and712.

The support reinforcing member 740 is rotatably connected to the secondfixed fulcrum shaft 24 and second movable fulcrum shaft 714 and, withthe movement of the support member 710, extends and shortens its length,whereby it maintains, by hydraulic pressure, its extended length whenthe support member 710 is set at the projecting position P1. The supportreinforcing member 740 can include, for example, a cylinder 741 withfluid sealed therein and a piston rod 742 insertable into and removablefrom the cylinder 541.

In FIG. 2 , there are provided two support reinforcing members 740.However, by providing at least one support reinforcing member 740, theposition change of the support member 710 in the first blow moldcarry-in/carry-out device 700 can be facilitated further.

There can be further included a second angle fixing tool 750 which, whenthe support member 710 is set at the projecting position P5, is used tofix the angles of the support member 710 and one link 721 of theplurality of links 721, 722. There can be further included a third anglefixing tool 760 which, when the support member 710 is set at theprojecting position P5, is used to fix the angle of the support member710 such that it is maintained in a horizontal state. Here, theabove-mentioned first to third angle fixing tools 730, 750 and 760 canemploy a structure which, similarly to the first and second angle fixingtools 530 and 550 of the first injection mold carry-in/carry-out device500, can fix the set angles of the projecting position P5 and storingposition P6 by inserting and removing a pin. Here, similarly to thethird angle fixing tool 760 of the first blow mold carry-in/carry-outdevice 700, a third angle fixing tool can be added to the firstinjection mold carry-in/carry-out device 500 as well.

3.2. Second Blow Mold Carry-In/Carry-Out Device

FIG. 8 shows a second blow mold carry-in/carry-out device 800 which isused to carry in and out a blow core mold 310 including a blow core 310Aand a stretch rod fixing plate 320 with a stretch rod 320A fixedthereto, respectively shown in FIG. 11 . The second blow moldcarry-in/carry-out device 800 includes a support member 810 thatsupports the blow core mold 310 serving as a mold component to becarried into and out from the blow molding machine, and a movingmechanism 820 that moves the support member 810 to a projecting positionP7 at which the support member 810 projects horizontally toward theoutside of the blow molding machine and a storing position P8 at whichthe support member 810 is stored by the blow molding machine.

The blow molding machine has a fixed fulcrum shaft 25. The supportmember 810 has a movable fulcrum shaft 811 movable together with thesupport member 810. The moving mechanism 820 has a link 821 rotatablysupported by the fixed fulcrum shaft 25 and movable fulcrum shaft 811.When the support member 810 is set at the projecting position P7, thelink 821 is set vertically with respect to the fixed fulcrum shaft 25 bya first angle fixing tool 830 and the support member 810 is sethorizontally with respect to the movable fulcrum shaft 811 by a secondangle fixing tool 840. The first and second angle fixing tools 830 and840 can be structured similarly to the first and second angle fixingtools 530 and 550 shown in FIG. 3 , while the angles of the supportmember 810 and link 821 can be fixed so that they can be maintained atthe projecting position P7 or storing position P8 by a pin. Here, at thestoring position P8, the support member 810 and link 821 are both storedparallel in the vertical direction or in the horizontal direction.

The support member 810 can be constituted of two rails 810A and 810Bsimilar to the two rails 610A and 610B shown in FIG. 9 . On the blowcore mold 310 serving as a mold component, there are providedprojections loaded on the rails 810A and 810B. By sliding theprojections on the rails 810A and 810B the blow core mold 310 can becarried into the lower side of the blow core mold fixing portion 302shown in FIG. 11 . The blow core mold 310 carried into the lower side ofthe blow core mold fixing portion 302 is fixed by the same method asshown in FIG. 7 . That is, while projections 310B provided on the blowcore mold 310 are held between a mounting attachment 303 and a fixingattachment 304, for example, an L-shaped attachment 304, the blow coremold 310 is fastened by bolts 305. However, the L-shaped attachment 304situated on the carry-in side of the blow core mold 310 in the blow coremold fixing portion 302 shown in FIG. 11 must be removed previously,because it interferes with the blow core mold 310 to be carried in. Theblow core mold 310 can be removed in reverse order to theabove-mentioned mounting process. Here, the mounting attachment 303 mayalso be formed integrally with the blow core mold fixing portion 302.

The stretch rod fixing plate 320 can be carried onto the blow core mold310 with the stretch rod 320A inserted into the vertical hole of theblow core mold 310 and they can be carried in simultaneously by thesecond blow mold carry-in/carry-out device 800. In this case, betweenthe stretch rod fixing plate 320 and blow core mold 310, as shown inFIG. 11 , a plurality of, for example, three preliminary stretchadjusting plates 330 (330A, 330B, 330C) are interposed therebetween.

The stretch rod fixing plate 320 and preliminary stretch adjustingplates 330 are supported between a fixing portion 306 and fixingattachments 307, for example, an L-shaped attachment 307. One of thefixing attachments 307 is fixed to the fixing portion 306 by a bolt 308and, after the stretch rod fixing plate 320 and preliminary stretchadjusting plates 330 are arranged, the other L-shaped attachment 307 isfixed to the fixing portion 306 by a bolt 309.

Here, the term “preliminary stretch” means that, in a stage where theblow core 310A of the blow core mold 310 is clamped to the lip mold andblow cavity split mold, before introduction of the blow air, the stretchrod 320A stretches a preform longitudinally. With the preliminarystretch, such section of the preform as exists just below its lipportion can be longitudinally stretched first, thereby being able toadjust the thickness distribution of a container to be blow molded.

As shown in FIG. 11 , when the preliminary stretch adjusting plates 330are disposed below the stretch rod fixing plate 320, a preliminarystretch stroke is zero. When at least one of the three preliminarystretch adjusting plates 330 is disposed above the stretch rod fixingplate 320, the position of the lower end of the stretch rod 320A islowered, thereby enabling the execution of the preliminary stretch. Bychanging the combination of the three preliminary stretch adjustingplates 330A, 330B and 330C disposed above the stretch rod fixing plate320, the preliminary stretch stroke can be changed. In the threepreliminary stretch adjusting plates 330A, 330B and 330C, there can bepreviously formed slits which enable their associated plates to beinserted and removed without interfering with the stretch rod 320A.Here, the blow core mold fixing portion 302 and stretch rod fixing plate320 are capable of lifting and lowering the blow core mold 310 andstretch rod 320A using a drive source such as an air cylinder, and thusthey are an example of an elevating portion.

4. Temperature Regulating Station

FIGS. 12 and 13 show how to mount a temperature regulating pot 210 (anexample of a lower mold component) and a temperature regulating core 220(an example of an upper mold component). As shown in FIG. 12 , to atemperature regulating pot fixing base 202 to be lifted and lowered byan air cylinder 201 fixed to the lower base 11, there is fixed amounting attachment 203 which includes a fixing attachment 204, forexample, an L-shaped attachment 204 fixed by a bolt 205. The temperatureregulating pot 210 includes projections 211 which are held by themounting attachments 203 and L-shaped attachments 204, respectively.However, the mounting attachments 203 may also be formed integrally withthe temperature regulating pot fixing base 202.

The L-shaped attachment 204 is permanently provided to the mountingattachment 203. By loosening the bolt 205 and rotating the L-shapedattachment 204 about the bolt 205 within a horizontal plane, theL-shaped attachment 204 can be received onto the upper surface of thetemperature regulating pot fixing base 202 without interfering with theprojection 211 of the temperature regulating pot 210. Next, after theL-shaped attachment 204 is rotated and set in a state shown in FIG. 12 ,by fastening the bolt 205, the temperature regulating pot 210 can befixed. Here, the L-shaped attachment 204 may also be a fixing attachmentwhich, similarly to the one used in the injection molding station 100,has a long-hole-shaped penetration hole for insertion of the bolt 205and, after the bolt 205 is loosened, can be advanced and retreatedwithin a horizontal plane.

As shown in FIG. 13 , the temperature regulating core 220 insertedthrough a lip mold into the temperature regulating pot 210 includes aprojection 221. A temperature regulating core fixing portion 231, whichis lifted and lowered by an air cylinder 230 (an example of an upperelevation drive portion) fixed to the upper base 12, includes fixingattachments 232, for example, L-shaped attachments 232, connectedthereto by bolts 233. The L-shaped attachments 232 are permanentlyprovided to the temperature regulating core fixing portion 231. Byloosening the bolts 233 and rotating the L-shaped attachments 232 aboutthe bolt 233 s within a horizontal plane, the L-shaped attachments 232can be received onto the lower surface of the temperature regulatingcore fixing portion 231 without interfering with the projection 221 ofthe temperature regulating core 220. Next, after the L-shapedattachments 232 are rotated and set in a state shown in FIG. 13 , byfastening the bolt 233, the temperature regulating core 220 can befixed. Here, the temperature regulating core fixing portion 231 capableof lifting and lowering the temperature regulating core 220 is called anupper elevation portion, while the temperature regulating pot fixingbase 202 capable of lifting and lowering the temperature regulating pot210 is called a lower elevation portion.

Although not shown, in the temperature regulating station 200 as well, amold component carry-in/carry-out device of either type of theabove-mentioned first, second injection mold carry-in/carry-out devices500, 600, or first, second blow mold carry-in/carry-out device 700, 800can be permanently provided or can be removably provided and storedwithin the machine base 10.

Here, with respect to the temperature regulating pot 210 and temperatureregulating core 220, similarly to the injection mold unit 110, bystacking them with the dummy lip plate 114 interposed therebetween, theycan be carried in and out as a temperature regulating unit. In this caseas well, after the temperature regulating pot 210 of the temperatureregulating unit is fixed as shown in FIG. 12 , before mounting the lipplate 14 and lip mold onto the transfer plate 13 supported by the upperbase 12 of the blow molding machine, the air cylinders 201 (an exampleof a lower elevation drive portion) and 230 respectively shown in FIGS.12 and 13 are driven to set the temperature regulating unit at the moldclamping position. At this time, since the lip plate 14 and lip mold arenot mounted on the transfer plate 13, the hole 16 (see FIG. 6 ) capableof passing the temperature regulating core 220 therethrough is opened.Therefore, in the mold component mounting time, the transfer plate 13 isnot lowered but, due to the lifting drive of the lower elevationportion, only the temperature regulating core 220 can be set through thehole of the transfer plate 13 at the upper position of the transferplate 13, specifically, at the mold clamping position.

On the other hand, as described above, the temperature regulating core220 of the temperature regulating unit is set at the mold clampingposition by interposing the dummy lip plate 114. By lowering thetemperature regulating core fixing portion 231 down to this moldclamping height position, the temperature regulating core 220 can befixed to the temperature regulating core fixing portion 231.

5. Removal Station

The removal station 400 shown in FIG. 1 supports a removal device 410shown in FIGS. 14 and 15 on the upper base 12 side thereof. The removaldevice 410 includes eject plates 413 each having a wedge-shaped leadingend which are fixed to the two sides of an elevation section 412 to belifted and lowered by an air cylinder 411. When the eject plates 413, asshown in FIG. 15 , are driven by the air cylinder 411 to lower togetherwith the elevation section 412, they are inserted into the wedge holesof a pair of lip plates 14 to drive the paired lip plates 14 to open.This drive opens a pair of lip split molds (not shown) supported by thepaired lip plates 14, thereby causing a blow molded container to falldown. In this embodiment, to the two eject plates 413, there are fixedrails 420 as support members (see FIG. 14 ).

An eject pin fixing plate 430 serving as a mold component has aplurality of eject pins 431 fixed thereto while they hang downtherefrom. The eject pin fixing plate 430 is carried into a mountingposition with its two ends carried on the rails 420. The eject pinfixing plate 430 can be fixed to the elevation section 412 when lockpins 421 are inserted from laterally of the two eject plates 413.

The number of components to be disposed in the removal station 400 issmaller than that of the injection molding station 100, temperatureregulating station 200 and blow molding station 300. Thus, by using itsempty space, as shown in FIG. 16 , there is disposed a lip platecarry-in/carry-out device 900.

6. Lip mold carry-in/carry-out device

The lip plate carry-in/carry-out device 900 includes two first rails 910which can swing about two fulcrum shafts 901 provided on the upper base12. The two first rails 910 swing to a projecting position P9 and astoring position P10. The two first rails 910 respectively have slits911 and, at the projecting position P9, bolts or lock pins 912 areinserted into the slits 911 to thereby fix the first rails to the upperbase 12.

As shown in FIG. 17(A), two second rails 13A (only one is shown in FIG.17(A)) for guiding a pair of lip plates 14 shown in FIG. 16 to open andclose are disposed on the longitudinal-direction two ends of the pairedlip plates 14 and are fixed by bolts 13B to the transfer plate 13 onwhich the paired lip plates 14 shown in FIG. 16 are supported. Thepaired lip plates 14 respectively include projections 14A which areprojected from the longitudinal-direction two ends thereof. Theprojections 14A are to be loaded on the second rails 13A.

The second rail 13A shown in FIG. 17(A) is situated on the extension ofthe first rail 910 shown in FIG. 16 in the insertion direction of thelip plate 14. Therefore, when the lip plate 14 is carried in along therail 910 with the projection 14A of the lip plate 14 loaded on the rail910, the lip plate 14 can be slid into the second rail 13A. When a lipplate fixing attachment 13C, for example, a positioning pin 13C isinserted from above the transfer plate 13 through a hole 13D formed inthe transfer plate 13 into a half-divided slit 14B formed in theprojection 14A of the lip plate 14, the mounting of the lip plate 14 iscompleted. As disclosed in JP-A-H08-244103, conventionally, apositioning pin needed to be inserted into the positioning hole of aneck mold support plate (lip plate) from the lower side and next amember to prevent the fall of the positioning pin must be bolt fastenedto the rail. Thus, when the number of lip plates used increases, thetime necessary for the operation to fix the lip plates tends toincrease. Also, although there is provided a fall preventive member asmeasures to prevent the positioning pin against removal, when the cyclespeed (bottle production speed) increases, loads are applied to thepositioning pin and fall preventive member, thereby raising a fear thatthey will be shifted in position or will be removed. With suchphenomenon, the neck mold support plate (lip plate) is also caused toshift in position, whereby a mold component or machine component can bedamaged in the mold clamping time. Further, such unexpected damage andfailure can put an operator in danger. In this embodiment, since thepositioning pin 13C is inserted from the upper side and is supported bythe rail 13A, the fear of the position shift and fall can be improvedgreatly. Also, the time necessary for the carry-in/carry-out operationof the lip plates 14 and the maintenance thereof can be reduced, therebybeing able to enhance the efficiency of the operation greatly.

Instead of FIG. 17(A), as shown in FIG. 17(B), the lip plate 14 can alsobe formed of a flat plate with no level difference in the thicknessdirection. In this case, the longitudinal-direction two ends of the lipplate 14 are loaded on the second rail 13A.

Although description has been given specifically of the embodiment, itis easy for a person skilled in the art to understand that variousmodifications are possible without departing substantially from the newmatters and effects of the invention. Therefore, such modifications areto fall under the scope of the invention. For example, any terms used atleast once together with different terms of broader or synonymous sensein the specification or drawings can be replaced with such differentterms in any portions of the specification and drawings.

The present application is based on Japanese Patent Application No.2011-233452 filed on Oct. 24, 2011 and Japanese Patent Application No.2012-231478 filed on Oct. 19, 2012, and the contents thereof areincorporated herein for reference.

DESCRIPTION OF REFERENCE NUMERALS AND SIGNS

-   -   10: machine base    -   11: lower base    -   12: upper base    -   13: transfer plate    -   13A: second rail    -   14: lip plate    -   14A: projection    -   20: first fixed fulcrum shaft    -   21: second fixed fulcrum shaft    -   22: fixed fulcrum shaft    -   23: first fixed fulcrum shaft    -   24: second fixed fulcrum shaft    -   25: fixed fulcrum shaft    -   100: injection molding station    -   101: movable tie bar    -   102: mold clamping plate    -   111: hot runner mold    -   112: injection cavity mold    -   113: injection core mold    -   114: dummy lip plate    -   110: injection mold unit    -   200: temperature regulating station    -   300: blow molding station    -   400: removal station    -   500: first injection mold carry-in/carry-out device    -   510: support member    -   511: base end portion    -   512: free end portion    -   513: first movable fulcrum shaft    -   520: moving mechanism    -   521, 522: link    -   521A, 522A: first support hole    -   521B: second support hole    -   530: first angle fixing tool    -   531: first angle fixing plate    -   532, 533: fulcrum shaft    -   534, 535: first pin    -   534A, 535A: first insertion hole    -   534B, 535B; second insertion hole    -   540: support reinforcing member    -   550: second angle fixing tool    -   551: second angle fixing plate    -   552: second pin    -   552A: third insertion hole    -   552B: fourth insertion hole    -   600: second injection mold carry-in/carry-out device    -   610: support member    -   610A, 610B: rail    -   611: movable fulcrum shaft    -   620: moving mechanism    -   630: first angle fixing tool    -   640: second angle fixing tool    -   700: first blow mold carry-in/carry-out device    -   710: support member    -   711: base end portion    -   712: free end portion    -   713: first movable fulcrum shaft    -   720: moving mechanism    -   721, 722: link    -   730: first angle fixing tool    -   740: support reinforcing member    -   750: second angle fixing tool    -   760: third angle fixing tool    -   800: second blow mold carry-in/carry-out device    -   810: support member    -   810A, 810B: rail    -   811: movable fulcrum shaft    -   820: moving mechanism    -   830: first angle fixing tool    -   840: second angle fixing tool    -   900: lip plate carry-in/carry-out device    -   901: fulcrum shaft    -   910: first rail    -   P1, P3, P5, P7, P9: projecting position    -   P2, P4, P6, P8, P10: storing position

1. A method for attaching a mold unit to a transfer plate, the mold unitbeing attachable to a blow molding machine of a hot parison system,wherein the mold unit comprises: a pair of lip plates attachable to thetransfer plate and each having a half-divided slit, the lip plateshaving: protrusions located on both ends of the lip plates in alongitudinal direction and configured to be placed on two second railsfixed on the transfer plate; and a hole formed by combining thehalf-divided slits, the hole being configured to fix the lip plates tothe transfer plate by inserting a portion of a positioning pin into thehole, and wherein the method comprises: placing the projections of thelip plates on two first rails fixed on an upper base of the blow moldingmachine; guiding the lip plates from the first rails to the secondrails; and inserting the portion of the positioning pin from above intoa hole of the transfer plate and the hole of the lip plates to fix thelip plates to the transfer plate on the second rails.
 2. The methodaccording to claim 1, wherein the two first rails are each swingableabout a fulcrum shaft provided on the upper base between a storingposition and a projecting position, the storing position being aposition where the first rails are not located on an extension line ofthe second rails, the projecting position being a position where thefirst rails are located on the extension line of the second rails, andwherein the protrusions are placed on the first rails when the firstrails are in the projecting position.
 3. A mold unit attachable to arotation transfer type blow molding machine of a hot parison system, theblow molding machine including an eject plate, the mold unit comprising:an eject pin fixing plate configured to be coupled to the eject plate,wherein a lateral surface of the eject pin fixing plate is provided witha recess into which a lock pin is insertable via a through hole of theeject plate.
 4. The mold unit according to claim 3, further comprising apair of lip plates into which a tip end of the eject plate isinsertable.
 5. The mold unit according to claim 4, wherein the lipplates include a lip mold, and wherein the mold unit further comprisesat least one of a mold for injection molding, a mold for temperatureregulating, and a mold for blow molding, which are in contact with thelip mold.
 6. The mold unit according to claim 3, wherein the mold unitfurther comprises a plurality of eject pins fixed to the eject pinfixing plate.
 7. A method of attaching the mold unit according to claim3 to the blow molding machine, the method comprising: inserting the lockpin into the through hole of the eject plate and into the recess of theeject pin fixing plate to fix the eject pin fixing plate to the ejectplate.
 8. The method according to claim 7, wherein the blow moldingmachine includes: a lower base; an upper base facing the lower base; anda removal device supported above the upper base, the removal deviceincluding: an elevation section configured to be lifted and lowered; andthe eject plate fixed to both ends of the elevation section in alongitudinal direction, a tip end of the eject plate having a wedgeshape, and wherein the eject plate includes a rail, the lock pin, andthe through hole into which the lock pin is inserted.
 9. The methodaccording to claim 8, further comprising: placing the eject pin fixingplate on the rail of the eject plate; and moving the eject pin fixingplate along the rail to a position where the recess of the eject pinfixing plate and the through hole of the eject plate are overlapped witheach other.